Dr. Pankaj Pathak is an Assistant Professor at SRM University Amaravati, India, with a keen interest in sustainable and green energy resources, waste management and geochemistry, including sustainable handling of nuclear waste and associated environmental impacts. She was involved in several research projects at the Indian Institute of Technology (IIT-Bombay) related to nuclear waste management and characterization of buffer materials for nuclear waste repositories. Also, she has gained research experience in the area of hazardous waste and liquid waste treatment technology, along with hydrometallurgical recovery of metals from waste streams, their safe disposal and remediation techniques at CSIR-National Metallurgical Laboratory (Jamshedpur). Dr. Rajiv Ranjan Srivastava is a Research Professor at the Institute of Research and Development, Duy Tan University, DaNang Vietnam. He holds a Ph.D. from the Korea University of Science and Technology (UST). He has workedat TAE-HYUNG Recycling (R&D centre, Korea), Rubamin Limited (Rubamin Technology Centre, India), CSIR-National Metallurgical Laboratory (India) in various positions. His inter-disciplinary research interests include waste management, urban mining, sustainable management of environmental resources, and hydrometallurgical exploitation of energy-critical elements. He is a life member of The Catalysis Society of India and has published several papers in top-ranking SCI journals as well as a number of book chapters. He also serves as a reviewer for various respected international journals.